Texas Instruments SN65HVD1781DG4, RS-422/RS-485 Transceiver, Half-Duplex, 1 Driver/1 Receiver, 1 Mbps, 3.15V~5.5V, -40°C~125°C, 8-SOIC, Tube.
| Parameter | Value |
|---|---|
| Type | Transceiver |
| Mounting | Surface Mount |
| Supply voltage | 3.15V ~ 5.5V |
| Protocol | RS422, RS485 |
| Operating temperature | -40°C~125°C |
| Duplex | Half |
| Package | Tube |
| Data rate | 1Mbps |
| Case | 8-SOIC (0.154\", 3.90mm Width) |
| Receiver hysteresis | 50 mV |
| Number of drivers (Receivers) | 1/1 |
The receiver inputs are also compatible with 3.3 V logic levels when the supply is 3.3 V, so no external translation is needed for a 3.3 V UART or microcontroller. At 5 V the driver output swing meets the RS-485 standard for longer or more heavily loaded buses.
The two parts are electrically identical. The only difference is the shipping medium: the DG4 suffix indicates Tube packaging, while the DR suffix indicates Tape & Reel. Both are 8-SOIC, active, and share the same datasheet.
Yes. The supply range includes 3.3 V, and the receiver inputs accept 3.3 V logic levels when powered from a 3.3 V rail. No external level translation is required for a 3.3 V UART.
The device supports data rates up to 1 Mbps, suitable for most industrial RS-485 fieldbus and building automation applications.